74AC161PC

Counter Dividers Overview

The Fairchild Semiconductor 74AC161PC is a synchronous 4-bit binary counter belonging to the AC series. It features positive edge triggering and an asynchronous reset function that overrides all other inputs to force outputs low. The device supports parallel load capabilities and includes count enable controls for versatile cascading applications. It operates within a supply voltage range of 2 V to 6 V and is housed in a 16-pin PDIP package with a standard 0.300-inch width.

Counter Dividers Feature Summary

• Synchronous counting operation triggered by the positive edge of the clock signal
• Asynchronous master-reset input for immediate output clearing
• Parallel load capability for programmable preset values
• Terminal count output designed for high-speed multi-stage expansion

Counter Dividers Applications

• High-speed synchronous modulo-16 binary counting circuits
• Programmable frequency dividers utilizing parallel load inputs
• Cascaded multi-stage counter systems requiring terminal count outputs

Counter Dividers Procurement Notes

Verify component authenticity through official manufacturer channels or authorized distributors. Confirm package integrity and pin alignment against the 16-DIP specification. Check for RoHS compliance status as manufacturing practices may vary across production batches. Ensure storage conditions meet moisture sensitivity level requirements to prevent damage prior to assembly.

Counter Dividers Selection Notes

Select this component when synchronous operation is required to eliminate ripple clock spikes associated with asynchronous counters. The AC series offers higher speed performance compared to LS variants while maintaining CMOS compatibility. Verify that the asynchronous reset behavior aligns with system timing requirements, as it differs from the synchronous clear found in the 74AC163 variant.

Counter Dividers Part Context

This part belongs to the 74AC logic family, characterized by high-speed silicon-gate CMOS technology. It serves as a functional equivalent to other industry-standard 4-bit synchronous binary counters. The device provides internal carry look-ahead support for efficient cascading without external gating logic, ensuring reliable operation in complex digital timing sequences.

Counter Dividers Replacement Considerations

CD74AC161E (Texas Instruments) is a documented similar substitute. Verify pinout compatibility and electrical specifications before implementation.